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No. 622,540. Patented Apr. 4, I899. B. V. ROBERTS.

GAS ATTACHMENT FOB STOVES 0R RANGES.

(Application filed Apr. 12, 1898.) (No Model.) 2 Sheets-Sheei i.

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m: NORRIS PETERS 00v, FHOTO-LITHO WASHINGTON, p. 9

No. 622,540. v

Patented Apr. 4, I899.

. ROBERTS.

GAS ATTACHMENT FOR STUVES 0B RANGES (Application filed Api'. 12, 1895,

2 Sheets-Sheet 2 (No Model.)

1-H: uonms PETER S co PHOTO-LITHOT, wnsumurou. a c

.rvrrn STATES PATET rrrcn.

CLARENCE V. ROBERTS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THETHOMAS, ROBERTS, STEVENSON COMPANY, OF SAME PLACE.

GAS ATTACHMENT FOR STOVES OR RANGES.

srnoirroArrolv forming part of Letters Patent No. 622,540, dated April4, 1899.

Application filed April 12, 1898, Serial No. 677,331. (No model.) A

To rtZZ witont it may concern:

Be it known that I, CLARENCE V. ROBERTS, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Gas Attachments for Stoves or Ranges, of which thefollowing is a specification.

My invention relates to that class of coal stoves or ranges which areprovided with to burners whereby gas may be used as fuel when the use ofcoal is not convenient or desirable, the gas used being either theordinary illuminating-gas or a gas derived from the vaporization ofgasolene or other hydrocarbon.

One object of my invention is to so construct the devices employed forheating the oven with gas that they will not interfere with the properoperation of the stove when coal is being burned, a further object beingto insure the eflective heating of the water in the elevated boiler ofthe range when gas is used as fuel, and a still further object being toprovide a convenient broiling device for use when 2 5 gas is employed.

In the accompanying drawings, Figure 1 is a perspective view of a stoveor range constructed in accordance with my invention. Fig. 2 is alongitudinal section of the oven 0 portion of the stove, showing theparts as they appear when gas is being used as fuel. Fig. 3 is a view ofpart of the lower portion of the oven structure, showing the same as itappears when coal is being used as fuel. Fig.

5 4. is atransverse section, on an enlarged scale,

on the line at er, Fig. 2. Fig. 5 is a longitudinal section of part ofthe elevated boiler structure of the stove or range. Fig. 6 is atransverse section through said boiler structureandthroughthebroilerattachment. Fig. 7 is a sectional view on the line tow, Fig. 2; and Fig. 8 is a transverse section of part of the lower-fluestructure, illustrating a modification.

5 1 represents the oven of the stove; 2, part of the flre-pot5 3, thetop fine, with gasburners 41 1 underneath the pot-holes in the topplate; 5, the descending flue at the side of the oven; 6, the bottomflue, and 7 the flue-strip,

usually located in said bottom flue for caus- 5o ing the products ofcombustion to circulate through the latter in their passage from theside flue 5'to the ascending flue 53, Fig. 7, which communicates withthe chamber at the rear of the top flue back of the flue-strip 3 andleading to the smoke-pipe 9. This top flue strip 3 is in line with thevertical strip 5 which separates the fines 5 and 53, so that theproducts of combustion ascending the said flue 53 cannot gain access tothat portion of the top flue containing the burners at. All of theseparts are constructed as usual, with the exception of the flue-strip 7,which instead of being a single flat strip, as usual, has a curvedportion 10 flanked by a curved cap-plate 10, the two forming a tubularchamher, through which passes the pipe 11, whereby the oven-burner 12 issupplied with a mixture of gas and air from a mixer 13 at the outer endof said pipe 11, said mixer being supplied with gas from the supply-pipe14 at the side of the range.

The diameter of the tubular chamber within the flue-strip is somewhatgreater than the external diameter of the pipe 11, so as to pro- Vide anair-chamber surrounding the latter, and thus protect it in large measurefrom the heat radiated from the burner 12 or from the hot oven. By thismeans I prevent that tendency to backflow of air and gas through the Thebottom plate 15 of the oven has in it 0 A an opening, to which when theburner 12 is in use is applied an open frame 16, with detachable conicalplate or deflector 17 for throwing outward the products of combustionarising from the burner 12, said frame also having a depending flange 17which crosses the bottom flue 6 and incloses the burner 12 except wherethe supply-pipe enters the same.

By reason of this inclosing flange the products of combustion from theburner 12 are prevented from escaping into the flue 6; but in order tosupply to said burner air sufficient to support combustion I form in thebottom plate of the range, below the opening in the plate 15, an openingsurrounded by a short 11 pwardl y-proj ectin g flange 19, through whichopening external air can flow to supply the burner, the flange directingthe air up through the central opening of said burner. Instead offorming an opening in the bottom of the stove, however, for this purposethere may be a front, back, or side opening supplying an air-chamber,with flanged outlet 19 at the inner end, as shown, for instance, in Fig.8.

Proper draft through the oven when the burner 12 is in use is effectedby an opening or openings 20, located at the rear portion of the sideplate 21 of the oven and contained in a chamber 50, formed at the top ofthe oven by a plate 51, with openings 52 in the bottom, as shown inFigs. 2 and 7, the openings 20 being controlled by a suitable slidingdamper 22, so that their area may be regulated as desired or they may becompletely closed when the gas-burner 12 is not in use for the purposeof heating the oven. By this means the products of combustion from theburner 12 are drawn toward the central portion of the top of the oven,and thence directed to the ascending side flue 53, which flanks thedescending flue 5, as shown in Fig. 7, and from said flue 53 theproducts of combustion find their way through the chamber at the rear ofthe top flue 3 into the smokepipe of the range, the draft beingregulated by the adjustment of the damper 22.

Openings leading from the oven into the room or apartment in which thestove is situated may be used, if desired; but it is preferable toprovide communication between the oven and flue in order to insure adraft through the oven.

When coal is being used as fuel. in the range, the frame 16 is removedand the opening in the bottom plate 15 of the oven is closed by a plate23, as shown in Fig. 3, this plate having a depending plug 24, whichrests upon the top of the flange 19, surrounding the opening in thebottom plate of the stove, thereby closing said opening and preventingthe access of air to the bottom flue 6, as is necessary under theconditions of Working when coal is employed as fuel. The plug 24 ismounted upon a bolt 25, depending from the plate 23, so that said plugcan have a limited amount of vertical and lateral play independent ofsaid plate, in order that it may seat itself properly upon the top ofthe flange 19 irrespective of slight variations in the distance apart ofthe plates of the stove, such as might exist in original structures ormight be caused by'warping of the parts. The plate 23 also has on theunder side an enlargement or flange 28, which fits snugly to the top ofthe burner 12 and closes the same so tightly that no air can gain accessto the flue 6 through said burner when the plate 23 is in place.

When the gas-burners 4 are employed in connection with the pot-holes onthe top of the range, said pot-holes are provided with gratings 26, suchas are usually employed in connection with gas-stove burners; but whencoal is being used as fuel these gratings may be replaced by the usualplates 27. (Shown detached in Fig. 1.)

The gas-pipe 14 has a valve 29, whereby the flow through the pipe 11 isregulated, and also has valved branches 30 and 31, which govern the flowof gas to the burners 4, and the pipe 14 is carried along the front ofthe stove and rearwardly along one side of the same and then upwardlyand is provided at and near said upper end with three valved branchesfor supplying the mixers 32, 33, and 34, these mixers being used,respectively, in connection with the broiler 35, the pipe 36 for heatingthe elevated boiler 37, and the pilot-light 39, whereby the ignition ofthe jets on said pipe v 36 is effected in the ordinary manner.

A segmental shield or casing 40 extends from the rear side of the boilerdown behind the pipe 36 and then forwardly under said pipe and under theboiler until it meets the front casing 41, so that the products ofcombustion escaping from the pipe 36 are com.- pelled to pass forwardlyunder the boiler 37, thence up in front of the same, and thencebackwardly over the top of the boiler to the smoke-pipe 9, Which theyenter through suitable openings in the front of the same, these openingsbeing controlled by a damper 42, which is operated by a rod extending tothe front of the casing 41 and provided with a suitable handle, wherebyit may be readily manipulated. By this means the products of combustionfrom the burner 36 are compelled to pass around the greater portion ofthe circumference of the boiler 37, so as to exercise their maximumeffectiveness in heating the boiler.

Openings,such as 43,are formed in the shield 40 to supply air to theburner 36, and the joint between the rear portionof said shield and theshell of the boiler is preferably closed by asbestos or other suitablepacking, so as to prevent any flow of the products of combustionupwardly through said joint.

In order to prevent either the escape of the products of combustion orthe inflow of air at either end of the boiler, I provide each of therecessed end plates 44 of the boiler-supporting structure with a ring45, which closes the mouth of said recess, and I fill the recess withasbestos or other suitable packing 46, so as to form a tight jointbetween the boilershell and the end frame.

The broiler 35 occupies onehalf of the usual warming-closet, which islocated below the elevated boiler, as usual in ranges of the class towhich my invention relates, and the IIO smoke and gases arising fromthe'operation of the broiler ascend'in the rear of the boiler and escapethrough the dampered opening in the upper portion of the smoke-pipe.

opening in the oven-bottom, a gas-burner below said opening, a mixer anda supply-pipe for the burner leading from said mixer, and a bottom-fluestrip having a chamber through which said burner supply-pipe passes, andwhich forms an air-space surrounding said pipe, substantially asspecified.

2. The combination of a stove adapted to burn either solid or gaseousfuel having an opening in the bottom plate of the oven, an annulargas-burner below said opening, a lower flue for products of combustionfrom the solid-fuel burner, and an opening in the lower flue forsupplying air to said burner, said opening being surrounded by a flangeprojecting upwardly within the annular burner so as to direct the air tothe burner, substantially as specified.

3. The combination in a stove adapted for burning either solid orgaseous fuel, of the bottom plate of the oven having an opening therein,a lower flue for products of combustion from the solid-fuel burner andalso having a bottom opening in the same, a gas burner in said fine anda plate closing said opening in the bottom plate of the oven when thegas-burner is not in use, said plate having a depending plug for closingthe opening into the lower flue, substantially as specified.

4. The combination in a stove adapted for burning either solid orgaseous fuel, of the bottom plate of the oven having an opening therein,a bottom flue for products of combustion from the solid-fuel burner andalso having an opening in the same, the latter opening being surroundedby an upwardlyprojecting flange, a gas-burner in said lower flue, and aplate adapted to close the opening in the bottom plate of the oven whenthe burner is not in use, said plate having a dependingplug for restingupon the top of said flange and thereby closing the opening into thelower flue, substantially as specified.

5. The combination in a'stove adapted for burning either solid orgaseous fuel,'of the bottom plate of the oven having an opening therein,a bottom flue for products of combustion from the solid-fuel burner andalso having an opening in the same, a gas-burner in said lower flue, anda plate adapted to close said opening in the bottom plate of the ovenwhen the gas-burner is not in use, said plate having a depending plugfor closing the opening into the lower flue, and said plug being somounted as to have a limited amount of play, substantially as specified.

6. In a stove, the combination of the bottom plate of the oven having anopening therein, an annular gas-burner below said opening, a frameadapted to the opening and having a depending annular flange forinclosing the burner, the bottom of the stove having an opening thereinwith an annular flange surrounding the said opening and projectingupwardly from the bottom within the annular burner, substantially asdescribed.

7. A stove or range having an elevated boiler, a front casing for theboiler, a shield extending from the rear and below the boiler -to saidcasing, a gas-burner between said shield and easing, a smoke-pipepassing upwardly in the rear of the boiler and having adamper-controlled opening at the rear of and in proximity to the upperportion of the boiler, and a broiler below said boiler and shield,whereby the products of combustion from the gas-burner pass up andaround the front of the boiler, while the products of combustion fromthebroiler pass up and around the rear of the boiler to thedamper-controlled opening in the smoke-pipe, substantially as described]8. A stove having a gas-burner for heating the oven, and a chamber withcentral inletopenings at the top of the oven, said top Ghttll1=- berdischarging into one of the flues of the stove, substantially asspecified.

9. A stove having a gas-burner for heating the oven, a top oven-chamberhaving openings communicating with the oven and other openingscommunicating with one of the flues of the stove, and a damper wherebythe draft through said top chamber is controlled, substantially asspecified.

10. The combination in a stove adapted for burning either solid orgaseous fuel and having a bottom flue for the products of com bustionfrom the solid-fuel burner, of the bottom plate of the oven having anopening in the same, and a gas-burner located in the said flue andbeneath said opening, with a cover-plate for closing the opening whenthe burner is not in use, said plate having a portion for resting uponthe top of the burner and closing the same, substantially as specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CLARENCE V. ROBERTS.

Vitnesses:

CI-IAs. H. BANNARD, FRANK E. BECHTOLD.

